# -*- coding: utf-8 -*-
"""
Created on Sat May  5 17:18:27 2018

@author: yefang

题目：一个数如果恰好等于它的因子之和，这个数就称为"完数"。例如6=1＋2＋3.编程找出1000以内的所有完数。

程序分析：请参照程序Python 练习实例14。
"""
from sys import stdout
for j in range(2,1001):
    k = []
    n = -1
    s = j
    for i in range(1,j):
            if j % i == 0:
                n += 1
                s -= i
                k.append(i)
    
    if s == 0:
        print (j)
        for i in range(n):
            stdout.write(str(k[i]))
            stdout.write(' ')
        print (k[n])